@mixin normalStyle($width,$height,$defaultValue:orange) {
    width:$width;
    height:$height;
    background-color:$defaultValue;
 }
 @mixin position($x,$y,$z,$q) {
        position: $x;
        left:$y;
        top:$z;
        bottom: $q;
 }
 @mixin ellipsis {
       overflow: hidden;
       white-space: nowrap;
       text-overflow: ellipsis;
     }